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Patent Searching and Data


Title:
VIDEO RECORDER HAVING AUTOMATIC STOP POSITION ADJUSTING MEANS
Document Type and Number:
Japanese Patent JPH03207045
Kind Code:
A
Abstract:

PURPOSE: To automatically set a tape at an optimum static reproducing position by detecting the level of the envelope curve of an FM signal in a preset angular position during the operation in a moving image mode and calculating a correction level.

CONSTITUTION: A signal processing unit 11 outputs a signal indicating the instantaneous level of the envelop curve of the FM signal. A moving image level is measured and is accumulated in a moving image accumulator 12. The measured value is used for calculating the moving image level ratio. Next, the static level in the prescribed angle position is measured and is accumulated in a static level accumulator 13 when a switching device 10 indicates that the operation is switched to a static mode operation to a tape driving logic circuit 14. The measured value in the position which is the reference for the calculation of the moving image level ratio is used for the purpose of the level ratio calculation to the static mode. The resultant actual level and the desired level which is previously obtd. are used to calculate the coefft. of tape position correction and, thereafter, the latter is used for correcting the tape position.


Inventors:
JIIKUFURIITO APITSUTSU
Application Number:
JP33692390A
Publication Date:
September 10, 1991
Filing Date:
November 30, 1990
Export Citation:
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Assignee:
NOKIA UNTERHALTUNGSELEKTRONIK
International Classes:
G11B15/18; G11B15/467; H04N5/783; (IPC1-7): G11B15/467; H04N5/783
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)